JPWO2013080619A1 - Energy management device, program - Google Patents

Abstract

An acquisition part acquires the electric energy for every measurement time prescribed | regulated for every branch line as an electric power usage in the several branch line electrically fed corresponding to several electric loads. The history storage unit stores the power usage amount for each branch line in association with the date and time of acquisition. The analysis unit obtains the power distribution for the magnitude of the power usage in the predetermined target period stored in the history storage unit, and calculates the power usage for which the cumulative relative frequency from the lower limit value of the power usage is equal to or greater than a specified threshold. Estimated standby power. Furthermore, the analysis unit determines whether or not the electric load corresponding to each branch line is in operation by using the standby power as a reference value and comparing the reference value and the amount of power usage. The determination result of the analysis unit is displayed on the display device through the output processing unit.

Description

  The present invention relates to an energy management device and a program for managing an operation state of an electric load.

  2. Description of the Related Art Conventionally, a technique for managing the operating state of an electrical load arranged in a space such as a house based on the amount of power used is known (see, for example, Japanese Patent Publication No. 2011-160358).

  The energy usage information providing system described in the above document measures the amount of power flowing through the circuit of the branch breaker provided on the distribution board, and associates the information indicating the measured amount of power with the plan view of the house room. It is displayed on the display screen.

  By the way, in recent years, an electric load that consumes a small amount of power even when not in use, such as an electric load attached to a remote control device or an electric load such as a communication device, has been increasing. That is, this type of electrical load consumes standby power even when not in use (not in operation). In addition, standby power differs depending on the type of electrical load, so it is not possible to clearly distinguish whether the electrical load is operating or not operating simply by measuring the amount of power flowing through the branch breaker circuit. There is.

  Therefore, an object of the present invention is to clearly distinguish whether the electrical load is operating or not operating by detecting standby power of the electrical load and determining whether the electrical load is operating based on the standby power. The object is to provide an energy management device and a program that make it possible.

  An energy management device according to the present invention includes: an acquisition unit that acquires, as a power usage amount, a power amount for each predetermined measurement time for each power supply path in a plurality of power supply paths that supply power corresponding to a plurality of electrical loads; A history storage unit that stores the power usage amount for each road in association with the acquired date and time, and a frequency distribution is determined for the magnitude of the power usage amount in a predetermined target period stored in the history storage unit. An electric load corresponding to each power supply path is operated by estimating a power usage amount that is equal to or greater than a threshold value as standby power, and comparing the reference value with the power usage amount using the standby power as a reference value. An analysis unit having a function of determining whether the medium is in the middle; and an output processing unit for causing the notification unit to present a determination result by the analysis unit.

  According to this configuration, the standby power of the electrical load is detected, and it is determined whether or not the electrical load is operating based on the standby power. Therefore, it is possible to clearly distinguish whether the electrical load is operating or not operating. It becomes possible.

  In this energy management device, the output processing unit corresponds to a function of displaying a floor plan of a space in which the plurality of electric loads are arranged on a display device, and a power usage amount for each of the power supply paths acquired by the acquisition unit. It is preferable to have a function of displaying information on a floor plan.

  In this energy management apparatus, a setting information storage unit in which setting information serving as a reference is set for each operation of the plurality of electric loads is added, and the analysis unit is configured based on the power usage amount acquired by the acquisition unit. It is preferable that the extracted information is compared with the setting information in the setting information storage unit to determine the usage state of each of the plurality of electric loads.

  In this energy management apparatus, the analysis unit compares each of the plurality of electric loads by comparing information extracted from the power usage acquired by the acquisition unit with setting information in the setting information storage unit. It is preferable to have a function of determining whether or not it is used wastefully as the usage state.

  In this energy management apparatus, the setting information is a power reference value defined for a power usage amount, and the analysis unit is configured such that the power usage amount acquired by the acquisition unit reaches the power reference value. Then, it is preferable to have a function of instructing the output processing unit to present to the notification means.

  In this energy management device, the energy management device further includes a load control unit that controls the operation of each of the plurality of electric loads, and the setting information is a peak cut value defined for a power usage amount, and the analysis unit includes: The function of instructing the load control unit to control the operation of the electric load corresponding to the direction in which the power usage is reduced when the power usage acquired by the acquisition unit reaches the peak cut value. It is preferable to have.

  In this energy management apparatus, the analysis unit extracts the power supply path to which an operating electrical load is connected using the power consumption for each power supply path acquired by the acquisition unit, and the extracted It is preferable to have a function of causing the notification unit to present a space associated with the power supply path from the output processing unit.

  In this energy management apparatus, the energy management apparatus further includes a type storage unit in which a type of electric load corresponding to each power supply path is registered, and the analysis unit has a specific type of electric load extracted using the type storage unit. A function for predicting a scheduled time at which the operation of the specific type of electric load is started as a habit from the time change of the power consumption stored in the history storage unit for the connected power supply path, and the specific type When an instruction to stop the electrical load is made before the scheduled time, the process continues to stop the specific type of electrical load based on the time difference between the received time and the scheduled time. The notification means presents a function to determine which of the processes to be operated is a decrease in the total amount of power usage and a process of reducing the total amount of power usage through the output processing unit. It is preferable to provide a capability.

  In this energy management apparatus, the analysis unit uses the time change in the power consumption stored in the history storage unit to change the plurality of electrical loads fed from the plurality of power supply paths to a large amount of startup power. A function of classifying the first electric load whose power is greater than or equal to a specified value with respect to the steady power and a second electric load whose starting power is less than the specified value with respect to the steady power; A function of extracting the time when the first electric load is habitually used as a scheduled time from the time change of the power consumption stored in the history storage unit, for the power supply path to which the electric load is connected, When an instruction to stop the first electric load before the scheduled time is given, either the process of stopping the first electric load or the process of operating the first electric load reduces the total amount of power usage. Or It is preferable to provide a function of, the function of presenting the process of reducing the total power consumption through the output processing section to the informing means.

  In this energy management apparatus, the history storage unit has a function of storing a history in which the analysis unit presents processing for reducing the total amount of power consumption through the output processing unit to the notification unit, and a function of reading the history It is further preferable to have

  In this energy management apparatus, the analysis unit obtains a feature amount extracted from a temporal change in the power usage amount for each of the feed passages, and compares the feature amount with a feature amount obtained in the past. It is preferable to have a function of detecting whether or not there is an abnormality in the plurality of electric loads that are fed through.

  The program according to the present invention includes: an acquisition unit that acquires, as a power usage amount, a power amount for each predetermined power supply time in a plurality of power supply paths that supply power corresponding to a plurality of electrical loads; A history storage unit that stores the power usage amount for each power supply path in association with the acquired date and time, and a frequency distribution is determined for the magnitude of the power usage amount in a predetermined target period stored in the history storage unit, and the relative frequency is defined. An electric load corresponding to each power supply path is estimated by estimating a power usage amount that is equal to or greater than the threshold value as standby power, and comparing the reference value with the magnitude of the power usage amount using the standby power as a reference value. An analysis unit having a function of determining whether or not the device is in operation, and an output processing unit that causes the notification unit to present a determination result by the analysis unit.

Preferred embodiments of the invention are described in further detail. Other features and advantages of the present invention will be better understood with reference to the following detailed description and accompanying drawings.
It is a block diagram which shows the energy management apparatus which concerns on Embodiment 1 of this invention. It is a figure which shows the transition example of the electric power consumption in the energy management apparatus which concerns on Embodiment 1 of this invention. It is a figure which shows the example of the frequency distribution calculated | required in the energy management apparatus which concerns on Embodiment 1 of this invention. It is explanatory drawing of the process which calculates | requires standby electric power in the energy management apparatus which concerns on Embodiment 1 of this invention. It is a figure which shows the example of a display on the display apparatus in the energy management apparatus which concerns on Embodiment 1 of this invention. It is explanatory drawing of the process which judges excessive power consumption in the energy management apparatus which concerns on Embodiment 1 of this invention. It is a block diagram which shows the energy management apparatus which concerns on Embodiment 2 of this invention. It is a figure which shows the operation example of the energy management apparatus which concerns on Embodiment 3 of this invention. It is a figure which shows the operation example of the energy management apparatus which concerns on Embodiment 3 of this invention. It is a figure which shows the operation example of the energy management apparatus which concerns on Embodiment 3 of this invention. It is a figure which shows the example of a display to the display apparatus in the energy management apparatus which concerns on Embodiment 3 of this invention. It is a figure explaining the operation example of the energy management apparatus which concerns on Embodiment 4 of this invention. It is a figure explaining the operation example of the energy management apparatus which concerns on Embodiment 4 of this invention. It is a figure explaining the other operation example of the energy management apparatus which concerns on Embodiment 4 of this invention. It is a figure explaining the other operation example of the energy management apparatus which concerns on Embodiment 4 of this invention. It is a figure explaining another example of operation of the energy management device concerning Embodiment 4 of the present invention. It is a figure explaining another example of operation of the energy management device concerning Embodiment 4 of the present invention. It is a figure explaining another example of operation of the energy management device concerning Embodiment 4 of the present invention. It is principle explanatory drawing of the energy management apparatus which concerns on Embodiment 4 of this invention. It is explanatory drawing of the process which detects deterioration and abnormality of an electrical load in the energy management apparatus which concerns on Embodiment 4 of this invention. It is explanatory drawing of the process which detects deterioration and abnormality of an electrical load in the energy management apparatus which concerns on Embodiment 4 of this invention. It is explanatory drawing of the process which detects deterioration and abnormality of an electrical load in the energy management apparatus which concerns on Embodiment 4 of this invention.

(Embodiment 1)
The energy management device described below acquires the power usage for each branch line branched from the main line in the distribution board, but it is also possible to acquire the power usage of the electric circuit further branched from the branch line. is there. In short, in a plurality of power supply paths that supply power corresponding to a plurality of electric loads, it is only necessary to acquire the amount of power used for each power supply path.

  As shown in FIG. 1, the electrical loads 21, 22,... Are connected to the branch lines 31, 32,. Are provided for each branch line 31, 32,..., And the measurement means 41, 42,. Measure power usage. In the following embodiments, the term “power consumption” is used to mean the amount of power acquired by the measuring means 41, 42,... Every certain measurement time (for example, 1 minute). Moreover, you may make it obtain | require electric power consumption with the energy management apparatus 10 mentioned later instead of the measurement means 41,42, .... That is, the measuring means 41, 42,... May measure the instantaneous power, and the energy management device 10 may calculate the integrated value in the measurement time of the instantaneous power as the power usage amount.

  The energy management apparatus 10 realizes the functions described below by operating a processor according to a program. That is, the energy management apparatus 10 includes a device including a processor selected from a microcomputer, a DSP (Digital Signal Processor), an FPGA (Field-Programmable Gate Array), and the like as hardware elements. The energy management apparatus 10 includes a storage device. As the storage device, a configuration including a movable part such as a hard disk device can be used, but a semiconductor memory is preferably used.

  The energy management apparatus 10 includes an acquisition unit 11 that acquires the power consumption measured by the measuring units 41, 42,... In the branch lines 31, 32,. The power usage for each branch line 31, 32,... Acquired by the acquisition unit 11 is stored in the history storage unit 12 together with the date and time when the power usage is acquired. The energy management apparatus 10 has a clock function (not shown) that measures the current time. Other information recorded in the history storage unit 12 will be described later. The data recorded in the history storage unit 12 is analyzed by the analysis unit 13.

  The analysis unit 13 has a function of obtaining a frequency distribution for the power usage amount for each predetermined target period (for example, one day) recorded in the history storage unit 12. That is, the analysis unit 13 divides the magnitude of power consumption into sections of a certain width (for example, 2 W · m), and obtains the frequency in a predetermined target period for each section. Furthermore, the analysis part 13 calculates | requires the relative frequency for every area from the calculated | required frequency distribution.

  The analysis unit 13 has a function of determining the presence or absence of standby power by using the relative frequency for each section of power consumption, and obtaining the magnitude of standby power when standby power is generated. The analysis unit 13 not only obtains standby power, but also uses information extracted from the power consumption acquired by the acquisition unit 11 and information extracted from data stored in the history storage unit 12. It also has a function of determining the usage state of the electrical loads 21, 22,. This function will be described later.

  The result of analysis by the analysis unit 13 is presented on the display device 20 as a notification unit through the output processing unit 14. The output processing unit 14 has a function of generating image data that determines the display content of the screen of the display device 20, and displays the display content based on the generated image data including the determination result of the analysis unit 13 on the display device 20. . As the display device 20, a dot matrix type display such as a liquid crystal display or an organic EL display is used. The notification means may be provided with a display lamp such as a light emitting diode, a speaker or a buzzer for performing auditory notification in addition to the display device 20. Furthermore, the display device 20 is preferably configured with a touch panel. That is, it is preferable that the display device 20 has a configuration that can be used as an operation unit that performs an input operation.

  However, the branch lines 31, 32,... Are not necessarily provided for each type of the electric loads 21, 22, ..., but the branch lines 31, 32,. It is often provided corresponding to (or by function).

  For example, electric loads 21, 22,... That have a relatively large amount of power consumption, such as air conditioners, electromagnetic cookers, and microwave ovens, are often provided with dedicated branch lines 31, 32,. In addition, when the branch lines 31, 32,... Are provided in units of rooms in the house, the luminaires are fixedly connected to the branch lines 31, 32,. There are many. Further, even if the electric loads 21, 22,... Connected to the outlet are used, the same branch line 31 is used for the refrigerator, the audio-visual equipment (television receiver, audio equipment, etc.), the information equipment (phone, computer, etc.). , 32,... Are likely to be continuously connected over a long period of time.

  As in the example described above, the types of electric loads 21, 22,... Connected to the branch lines 31, 32,. The usage amount is substantially associated with the types of electric loads 21, 22,. Of course, some measuring means 41, 42,... May be associated with a plurality of types of electric loads 21, 22,..., And some other measuring means 41, 42,. In some cases, the type of 22... Cannot be clearly defined. However, it can be considered that each measuring means 41, 42,... Is generally associated with the type of electrical loads 21, 22,.

  In order to utilize this relationship, the energy management apparatus 10 includes a type storage unit that associates the types of the electrical loads 21, 22,... With each branch line 31, 32,. 15 is provided. In order to register the correspondence between the branch lines 31, 32,... And the electric loads 21, 22,... In the type storage unit 15, an operation unit (not shown) provided in the energy management device 10 (for example, a touch panel used with the display device 20). ) Is preferably used. However, the information may be registered in the type storage unit 15 using another device such as a personal computer. In preparation for such a case, the energy management device 10 preferably includes an interface device for connecting another device.

  The type storage unit 15 is not an essential configuration. However, when the energy management apparatus 10 includes the type storage unit 15, not only the amount of electricity used and the date and time of each branch line 31, 32,..., But also the type of electric loads 21, 22,. Are preferably stored in the history storage unit 12 together.

  If the space managed by the energy management apparatus 10 is a residential space, the branch lines 31, 32,... Can be associated with a residential room instead of the type of the electrical loads 21, 22,. is there. In this case, the history storage unit 12 stores the transition of the power consumption for each room. In the following description, the power usage stored in the history storage unit 12 corresponds to the electrical loads 21, 22,..., The branch lines 31, 32,. A description will be given assuming the case. However, not all of the electric loads 21, 22,... And the branch lines 31, 32,. Can be stored.

  Below, it demonstrates concretely. FIG. 2 shows an example of changes in the amount of power used for one day (predetermined target period) acquired by the acquisition unit 11 for the branch lines 31, 32,... Corresponding to one room (for example, a living room). In the illustrated example, one day is divided into 0 to 1440 sections in minutes. When the information as shown in FIG. 2 is recorded in the history storage unit 12, the analysis unit 13 obtains a frequency distribution of the power usage amount as shown in FIG.

  In the example shown in FIG. 3, the power usage is divided into sections having a width of 2.05 W · m, and the frequency for each division is shown for the power usage obtained in one day. Moreover, the analysis part 13 calculates | requires the relative frequency for every area of electric power consumption based on frequency distribution. In FIG. 3, the numerical value on the left vertical axis represents the frequency, and the numerical value on the right vertical axis represents the relative frequency. Characteristic (1) indicates the cumulative relative frequency.

  By the way, except for the electrical loads 21, 22,... That are always on as in a refrigerator, the usage periods (periods that are on) of the electrical loads 21, 22,. The rule of being short enough is often true. In addition, even if power is used during the non-use period, only standby power is used, so it can be said that the power consumption during the use period is sufficiently small.

  Based on such knowledge, the analysis unit 13 in the present embodiment defines a power usage amount that is small enough not to occur during the usage period of the electrical loads 21, 22,... As the power threshold value Tp (see FIG. 3). The relative frequency of power consumption that is equal to or less than the threshold value Tp is obtained. When the power usage is equal to or less than the power threshold Tp, the power usage is considered to correspond to standby power. Therefore, the analysis unit 13 determines the power usage amount that is equal to or less than the power threshold Tp and has a sufficiently large relative frequency as standby power. The power threshold Tp is slightly larger than the upper limit of the power usage that is considered as standby power, and is a power usage that does not occur during the usage period of the electric loads 21, 22,. And so on.

  Furthermore, since the power usage amount in the section smaller than the power threshold value Tp may be standby power, the analysis unit 13 compares the relative frequency with the specified frequency threshold value Tf (see FIG. 3), and is equal to or higher than the frequency threshold value Tf. A certain amount of power used is regarded as the amount of power used during the non-use period. The frequency threshold value Tf is used to determine whether the electrical loads 21, 22,... Are in use periods or non-use periods. As described above, the non-use period is considered to be sufficiently longer than the use period, and is set to 0.5, for example.

  As described above, the analysis unit 13 estimates that a section of power usage that is equal to or lower than the power threshold Tp in the frequency distribution and that has a relative frequency equal to or higher than the frequency threshold Tf corresponds to standby power. In short, since the relative frequency for each section of the power consumption can be regarded as the occurrence probability of the power consumption represented in the section, when the occurrence probability of the power consumption is large, the corresponding electric loads 21, 22,. The power consumption is estimated as standby power.

  In the example shown in FIG. 3, since the relative frequency is greater than the frequency threshold value Tf for the 2.05 W · m interval that is equal to or less than the power threshold value Tp, this interval is considered to correspond to the standby power. Here, instead of using the frequency threshold value Tf, the analysis unit 13 has a relative frequency in the focused section that is significantly larger than the relative frequency in the other sections, and a relative frequency in the 0 W · s section is very small (0 in the figure). ) May be regarded as standby power. That is, in the example illustrated in FIG. 3, the power usage amount in the section of 2.05 W · m is regarded as standby power.

  In the example described above, the relative frequency is used, but the analysis unit 13 compares the cumulative relative frequency from the lower limit value of the power usage with the frequency threshold Tf, and the power at the time when the cumulative relative frequency exceeds the frequency threshold Tf. It is also possible to estimate the usage amount as standby power. In this case, it is not necessary to set the power threshold Tp, and the standby power can be estimated more easily.

  FIG. 4 shows a procedure for determining standby power in the analysis unit 13. The procedure shown in FIG. 4 is a state in which the frequency distribution of the power consumption is obtained by the analysis unit 13, and the occurrence probability corresponding to the cumulative relative frequency is compared with the probability threshold P corresponding to the frequency threshold Tf. An example is shown in which standby power is required. When the analysis unit 13 receives the frequency Mk (k = 1, 2,...) For each power usage interval wk (k = 1, 2,...) From the analysis unit 13, the interval w1 in which the power usage is minimum. The occurrence probability p1 is obtained using the frequency M1 (S11, S12). As shown in Equation 1, the occurrence probability pk is a value obtained by accumulating the frequencies of the sections wk (k = 1, 2,...) Selected in order from the smallest power usage amount and dividing by the total number N of power usage amounts. Expressed as a percentage. In Equation 1, j is the number of selected sections. Therefore, the occurrence probability p1 is obtained as p1 = (M1 / N) × 100.

  The occurrence probability pk is compared with a preset probability threshold P (S13). When the occurrence probability pk is less than the probability threshold P (S13: no), the frequency Mk of the section wk with the next smallest power usage is added (S14), and the process returns to step S12 to obtain the occurrence probability pk. pk is compared with the probability threshold P (S13). For example, if the occurrence probability p1 is less than the probability threshold P, the occurrence probability p2 is calculated as p2 = {(M1 + M2) / N} × 100 by adding the frequency M2 of the section w2. When the occurrence probability pk is equal to or higher than the probability threshold value P (S13: yes) by performing the above-described calculation an appropriate number of times, the analysis unit 13 regards the obtained power usage value of the section wk as the standby power value (S15). ).

  By using the technique described above, standby power for each branch line 31, 32,... Is required. In the operation shown in FIG. 4, the power threshold Tp is not used. However, when obtaining standby power, it is preferable to set an upper limit for the section wk to be selected by the power threshold Tp. By setting the upper limit of the section wk to be selected, the branch lines 31, 32,... Connected to the electric loads 21, 22,. The possibility of misidentifying the required amount of power as standby power is reduced.

  The power threshold Tp is preferably set according to the type of the electrical loads 21, 22,... For each branch line 31, 32,. That is, since the standby power is almost determined according to the type of the electric loads 21, 22,..., The power threshold value as the upper limit value of the power usage corresponding to the standby power is obtained by using the type of the electrical loads 21, 22,. Tp can be defined. In addition, what is necessary is just to set electric power threshold value Tp except a refrigerator etc., when the kind of electric load 21, 22, ... is known.

  As the display contents of the display device 20, as shown in FIG. 5, a floor plan is shown for the rooms R1, R2,..., And the electrical loads 21, 22,. Is preferred. The positions of the electric loads 21, 22,... Are specified by coordinates in the floor plan. In order to display the floor plan on the display device 20, the output processing unit 14 includes a floor plan showing the arrangement of the rooms R1, R2,... In the building, the electric loads 21, 22,. ,... Is preferably set in the output processing unit 14. In order to set such information in the output processing unit 14, as with the type storage unit 15, a touch panel used with the display device 20 or another device such as a personal computer connected to the interface device is used. The electric loads 21, 22,... And the rooms R1, R2,... Are associated with the power usage obtained for each of the measuring means 41, 42,.

  When the floor plan as shown in FIG. 5 is displayed on the screen of the display device 20, it is preferable to display the magnitude of standby power for each room corresponding to the branch lines 31, 32,. The magnitude of the standby power can be represented by a numerical value, a bar graph, or other figure (for example, a circle, a star, or a mascot). When the standby power is indicated by another figure, the size may be changed according to the size of the standby power.

  By the way, the analysis unit 13 determines whether or not the electrical loads 21, 22,... Are operating based on the power usage amount acquired by the acquisition unit 11 as well as the function of determining whether the power is standby power. It has the function to do. That is, when the power usage amount acquired by the acquisition unit 11 is sufficiently large (for example, several times or more) compared to the standby power, the branch lines 31, 32,. It is determined that the electrical loads 21, 22,.

  Further, the analysis unit 13 of the present embodiment also has a function of evaluating the amount of power usage acquired by the acquisition unit 11 as the usage state of the electric loads 21, 22,. The standard for evaluating the magnitude of the power usage is set by the user as the power usage rate. The analysis unit 13 determines that the operation of the electric loads 21, 22,... Is not energy saving (exceeds the target set by the user) when the power usage exceeds the power reference value determined by the power usage rate. And notify. That is, the analysis unit 13 determines that the power usage is excessive when the power usage exceeds the power reference value.

  The power usage rate is set by the user as a ratio (percentage) to the upper limit value (maximum power usage) of the power usage. For example, if the maximum power consumption is 25 W · m and the user sets the power usage rate to 80%, the power reference value is 20 W · m (= 25 W · m × 80%) The unit 13 notifies through the display device 20 when the power usage amount for each measurement time exceeds the power reference value. Taking FIG. 2 as an example, since it exceeds 20 W · m at the right end, notification is performed in this state. In addition, you may obtain | require a power reference value from the track record of electric power usage instead of setting it using the predetermined maximum electric power usage about branch line 31, 32, ....

  As described above, the target is not achieved by notifying the user that the power usage amount acquired by the acquisition unit 11 exceeds the power usage rate determined as the target value by the user. To be recognized. In other words, it is recognized that the power usage target set by the user is exceeded. In addition, when the floor plan is displayed on the screen of the display device 20 as shown in FIG. 5, the power usage exceeds the power usage rate for the rooms R1, R2,... Corresponding to the branch lines 31, 32,. It is only necessary to select and display figures and colors so as to call attention. In FIG. 5, the positions of the electrical loads 21, 22,... (Including the outlet) are indicated by circle marks in the floor plan, and the color of the mark is changed when the power usage exceeds the power usage rate (hatched line). This is an example.

  In the configuration described above, since the measuring means 41, 42,... Are provided for each branch line 31, 32,..., The sum of the maximum values of the power consumption defined for each branch line 31, 32,. What is necessary is just to use for the usage-amount. However, if possible, the above-described processing may be performed by defining the maximum power usage for the main line and measuring the power usage of the main line. It is also possible to determine the maximum power consumption based on the capacity of the breaker provided on the distribution board.

  The maximum power usage, the power usage rate, and the power reference value are registered as setting information in the setting information storage unit 16 provided in the energy management apparatus 10. As with the type storage unit 15, the setting information storage unit 16 is set using an operation unit (not shown) or another device such as a personal computer.

  The above operation of the analysis unit 13 is shown in FIG. In the illustrated example, the analysis unit 13 obtains the maximum power usage wmax from the transition of the past power usage stored in the history storage unit 12 (S21). Furthermore, the power reference value wp (= wmax × k) is determined by using the determined maximum power usage wmax and the set power usage rate k (S22). After the power reference value wp is determined, the analysis unit 13 sequentially acquires the power usage wi through the acquisition unit 11 (S23), and compares the acquired power usage wi with the power reference value wp (S24). . In step S24, during the period in which the measured power usage amount wi is less than the power reference value wp (S24: no), the power usage amount wi is acquired one after another (S23). In addition, when the measured power usage amount wi is equal to or greater than the power reference value wp (S24: yes), notification is made through the display device 20 (S25). That is, the display device 20 indicates to the user that the power is excessively used.

  As described above, since the power reference value is determined using the power usage rate set by the user, the user can set the target of the reduction rate with respect to the past power usage (maximum power usage). Become. In addition, when the power consumption exceeds the target power reference value, this is notified to the user through the display device 20, so that the user can set a target for the power reduction rate by calling attention. Awareness to achieve is made.

(Embodiment 2)
In the first embodiment, standby power is detected using a transition of power usage in a predetermined target period, and a power reference value based on a power usage rate set by a user is compared with a power usage to When the amount exceeds the power standard value, the user is alerted.

  This embodiment not only notifies that the power usage exceeds the power reference value, but also automatically controls the power usage by the electric loads 21, 22,... So as to limit the peak value of the power usage. A configuration to be reduced will be described. This type of function is called “peak cut”. The peak cut is used not only for the purpose of suppressing an increase in power consumption, but also for the purpose of suppressing an increase in electricity charges. In other words, when the contract with the electric power company (electric power company) is a “metered lamp”, it is preferable to set an upper limit for the power usage amount because the electricity bill increases if the power usage amount increases.

  Therefore, in order to perform the peak cut, a peak cut value is defined as the upper limit value of the power consumption, and when the power usage reaches the peak cut value, the output of some of the electric loads 21, 22,. However, it is necessary to reduce the power consumption. The peak cut value is registered as setting information in the setting information storage unit 16. In order to set the peak cut value in the setting information storage unit 16, as in the case of setting information in the type storage unit 15, another device such as an operation unit or a personal computer (not shown) is used.

  As shown in FIG. 7, the energy management apparatus 10 of the present embodiment includes a load control unit 17 that controls the operation of the electric loads 21, 22,. The analysis unit 13 obtains the power usage of the trunk line acquired by the acquisition unit 11 (or the total power usage of the branch lines 31, 32,...) And the peak cut value registered in the setting information storage unit 16. Compare. And if the analysis part 13 judges that the electric power consumption which the acquisition part 11 has acquired has reached the peak cut value, the load control part 17 will suppress the output of appropriate electric load 21, 22, .... To instruct.

  In order to suppress the output of the electric loads 21, 22,..., The operation of the electric loads 21, 22,. This control includes not only the case of selecting an operation state for reducing the amount of power used, but also the case of stopping the operation of the electric loads 21, 22,. For example, if the electrical loads 21, 22,... Are illumination loads, the output may be suppressed by dimming. If the electrical loads 21, 22,... Are air conditioning loads, the output is suppressed by changing the set temperature. Good. That is, the load control unit 17 performs adjustment of the light output of the lighting load, adjustment of the set temperature of the air conditioning load, and the like. Further, the load control unit 17 can instruct on / off of the electric loads 21, 22,.

  The route for giving instructions to the electric loads 21, 22,... From the load control unit 17 may be wired, but is preferably wireless in terms of construction. When using electric loads 21, 22,... Whose operation is instructed by a remote control device using infrared rays as a transmission medium, the load control unit 17 may be configured to function similarly to the remote control device. If the electrical loads 21, 22,... Are network devices, the load control unit 17 may be configured to be able to communicate with the network devices. A route for giving an instruction to the electric loads 21, 22,... From the load control unit 17 may use a power distribution network by using a power line carrier communication technique.

  By the way, when peak cutting is performed, the comfort obtained by using power may be impaired. That is, it may be difficult to achieve both reduction in power consumption and ensuring comfort. On the other hand, electrical loads 21, 22,... Such as lighting equipment and video equipment (such as a television receiver) may continue to be turned on even when they are not actually used. This means that power is wasted.

  The analysis unit 13 selects the electric loads 21, 22,... That suppress the output when the amount of power consumption increases and needs to perform peak cut, so that the amount of power consumption is not greatly impaired. It also has a function to reduce Therefore, the analysis unit 13 determines whether or not the electric loads 21, 22,... Are used, and presents the candidates for the unused electric loads 21, 22,. It has a function to do.

  The usage state (whether or not it is used wastefully) of the electrical loads 21, 22,... Is determined using the power usage amount for each branch line 31, 32,. As described in the first embodiment, in many cases, the branch lines 31, 32,... Have a corresponding relationship with a room, and a person corresponding to the branch lines 31, 32,. It can be said that the possibility exists. Here, the correspondence relationship between the branch lines 31, 32,... And the room has a one-to-one relationship and a many-to-one relationship in which the plurality of branch lines 31, 32,. Since one branch line 31, 32,... Is unlikely to correspond to a plurality of rooms, it can be said that the branch lines 31, 32,. This correspondence relationship is stored in the type storage unit 15, and the power usage for each branch line 31, 32,... Measured by the measuring means 41, 42,. Are summarized in

  When the power usage of the main line (or the total power usage of the branch lines 31, 32,...) Reaches the peak cut value, the analysis unit 13 uses the power usage of the branch lines 31, 32,. The power consumption for each is compared, and it is determined that there is a person in the room where the power consumption is large. Here, as described in the first embodiment, an appropriate threshold value is set for the power usage amount of each branch line 31, 32,..., And the electric loads 21, 22,. Is determined to be operating. That is, the threshold value for distinguishing the power consumption during operation of the electric loads 21, 22,... Is set with respect to the standby power of the electric loads 21, 22,.

  By the way, if only the room with the maximum power consumption is selected, it may be determined that there is no person even if there is another room where the person exists. Therefore, the analysis unit 13 arranges the power usage amount for each room in descending order, and determines that there is a person in the room where the power usage amount is equal to or more than the above-described threshold.

  When the analysis unit 13 detects a room in which a person is present, the analysis unit 13 extracts electrical loads 21, 22,... Used in a room in which no person is present. Whether or not the electrical loads 21, 22,... Are being used is determined using the difference between the power consumption and the standby power. That is, when the difference obtained by subtracting the standby power from the power consumption is larger than the prescribed threshold, it is determined that the electric loads 21, 22,. When performing the peak cut, the analysis unit 13 selects the electrical loads 21, 22,... Of the room estimated that there is no person, and outputs the output to the selected electrical loads 21, 22,. Give instructions to suppress.

  For example, it is assumed that air-conditioning equipment for a Japanese-style room and a living room is in operation, and it is necessary to perform peak cut. At this time, if the power usage of the branch lines 31, 32,... Corresponding to the living room is larger than the power usage of the branch lines 31, 32,. Is presumed to exist. In addition, since the power consumption of the Japanese-style room is less than that of the living room, there is a possibility that there is no person in the Japanese-style room. Therefore, the analysis unit 13 gives an instruction to the air conditioner in the Japanese room via the load control unit 17 so as to reduce the output.

  In other words, in a living room where there is a person, the output of the air conditioner is not reduced, so comfort is not impaired, and it is estimated that there is no person in the Japanese-style room. There is little possibility. Even if there are people in the Japanese-style room, it can be said that there are fewer people than in the living room, so even if the output of the air-conditioning equipment is reduced, the influence is small.

  As described above, the analysis unit 13 determines the necessity of peak cut using the transition of the power consumption of the main circuit. Further, the analysis unit 13 detects the operating electric loads 21, 22,... Using the difference in the power consumption with respect to the standby power by using the transition of the power usage of the branch lines 31, 32,. The presence / absence of a person in each room is also determined. Furthermore, the priority order is determined for the electric loads 21, 22,... That suppress the output in order to perform peak cut by using the transition of the power consumption. Therefore, even when performing a peak cut to reduce the power consumption of the main circuit, the output is suppressed in order from the electric loads 21, 22,. As a result, peak cutting can be performed without impairing comfort. Other configurations and operations are the same as those of the first embodiment.

(Embodiment 3)
In the second embodiment, the technology for determining whether or not power is used wastefully based on the amount of power used has been described. On the other hand, this embodiment estimates the number of people using the electric loads 21, 22,... Using the power consumption, and uses the electric loads 21, 22 wastefully using the electric power based on the number of people. A technique for estimating. In this embodiment, when the number of people in the space managed by the energy management apparatus 10 is known and the estimated number of people in the space exceeds the known number of people, the electric loads 21, 22,. Presumed to be used. In the present embodiment, peak cutting does not have to be performed automatically. Therefore, the energy management apparatus 10 will be described with respect to a case where the same configuration as that of the first embodiment shown in FIG. A configuration similar to that of the second embodiment may be employed.

  In the following, it is assumed that the space managed by the energy management apparatus 10 is in a house. If the space managed by the energy management device 10 is in a house, it can be said that the maximum number of people in the house in the normal time is known because it is the number of family members. The number of people at home varies with time, but it can be assumed that the maximum number of people in a general house does not vary except on special days.

  Since the standby power for each room is known by the technique described in the first embodiment, when the power usage acquired by the acquisition unit 11 exceeds the known standby power, the analysis unit 13 performs the electrical loads 21 and 22. , ... are used. For example, as illustrated in FIGS. 8A to 8C, determination thresholds Th <b> 1 to Th <b> 3 that are slightly larger than the standby power are set in the analysis unit 13 for each room. That is, the analysis unit 13 determines that the electrical loads 21, 22,... In the corresponding room are used when the power usage amount acquired by the acquisition unit 11 exceeds the determination thresholds Th1 to Th3.

  Further, when the energy management apparatus 10 is used, known information (reference setting information) such as the maximum number of people in the house is registered in the setting information storage unit 16. The analysis unit 13 has a function of detecting whether or not the electric loads 21, 22,... Are used in vain using the known information registered in the setting information storage unit 16.

  As described above, the analysis unit 13 determines whether or not the electrical loads 21, 22,... Are used for each room by comparing the power consumption acquired by the acquisition unit 11 with the determination thresholds Th1 to Th3. doing. Therefore, when the number of rooms in which the electric loads 21, 22,... Are used is larger than the number of persons registered in the setting information storage unit 16, the electric loads 21, 22,. It is estimated that When the analysis unit 13 estimates that the electric loads 21, 22,... Are used wastefully, the analysis unit 13 displays a list of rooms using the electric loads 21, 22,. An instruction to be displayed on the device 20 is given. Therefore, the user is alerted that the electrical loads 21, 22,.

  FIG. 9 is a display example when a floor plan of the first floor and the second floor is displayed on the display device 20, and a humanoid mark Q1 is displayed in a room where a person is estimated to exist based on the power usage amount for each room. ~ Q3 is displayed. That is, in the illustrated example, since the marks Q1 to Q3 are displayed in the three rooms of the living dining room R1, the Japanese-style room R2, and the bedroom R3, the number of persons determined from the amount of power used is estimated to be three. Here, in this house, if the maximum number of people registered in the setting information storage unit 16 is two, the number of people estimated based on the power consumption exceeds the number of registered people.

  That is, the analysis unit 13 determines which of the living dining room R1, the Japanese-style room R2, and the bedroom R3 from the size relationship between the number of rooms using the electrical loads 21, 22,... And the number of persons registered in the setting information storage unit 16. It is determined that the electric loads 21, 22,... In this case, the analysis unit 13 outputs the room names as candidates by using the electric loads 21, 22,... Operating wastefully at the three locations of the living dining room R1, the Japanese-style room R2, and the bedroom R3. The processing unit 14 is instructed to display on the display device 20.

  Through the operation described above, the user notices that the electric loads 21, 22,. That is, when the user recognizes the necessity by calling attention, the user acts to stop any one of the electric loads 21, 22,. Other configurations and operations are the same as those in the first and second embodiments. The present embodiment is based on the configuration of the first embodiment, and can be combined with the configuration of the second embodiment.

(Embodiment 4)
The energy management apparatus 10 of this embodiment employs either the configuration of the first embodiment shown in FIG. 1 or the configuration of the second embodiment shown in FIG. Moreover, the energy management apparatus 10 of this embodiment is provided with the function which estimates the usage pattern of the electric loads 21, 22, ... by a user by using transition of the electric power usage amount preserve | saved at the log | history memory | storage part 12. FIG. In addition, the energy management device 10 provides advice when a user performs an operation to change the operation of the electrical loads 21, 22,. It has the function to perform. That is, in the present embodiment, when the user performs an operation to stop the electric loads 21, 22,..., The total amount of power consumption when the user immediately stops, and the case where the operation is continued without stopping. Advise operations that save energy by comparing the total amount of electricity used.

  In order to enable the above-described operation, two types of techniques described below are used alone or in combination. In the first technique, the electric loads 21, 22,... Are classified into two types based on the time change of the power consumption. In general, it is known that the electric loads 21, 22,... Have a larger amount of power usage than the steady state at the beginning of startup, and have little change in the amount of power usage at the beginning of startup and the steady state. . For example, it is known that a thermal apparatus such as an air conditioner having electrical loads 21, 22,... Has a startup power several times or more higher than a steady power in a steady state. On the other hand, a lighting fixture using a light emitting diode has little difference between starting power and steady power.

  The analysis unit 13 of the present embodiment classifies the types of the electric loads 21, 22,... By comparing the starting power and the steady power by using the above-described event. The start power and the steady power are, for example, power at a predetermined time after a specified time has elapsed from the start of operation, with the peak value of power usage within a specified time from the start of operation of the electrical loads 21, 22,. What is necessary is just to let the average value of usage-amount be steady electric power. In addition, the sum of power consumption from the start of operation until the specified time elapses is the start-up power, and the sum of power consumption during the specified time after the specified time has elapsed from the start of operation is steady. Electric power may be used. In order to obtain the starting power and the steady power of the electric loads 21, 22,..., Information stored in the history storage unit 12 is used.

  After calculating the starting power and the steady power as described above, the analysis unit 13 obtains the ratio of the starting power to the steady power, and classifies the ratio into a case where the ratio is greater than or equal to a prescribed value and a case where the ratio is less than the prescribed value. Thus, the electric loads 21, 22,... Are classified into two types. That is, the analysis unit 13 classifies the electric loads 21, 22,... Into two types by using the time change of the power consumption stored in the history storage unit 12. In the following, the electric loads 21, 22,... With the ratio of the starting power to the steady power being equal to or higher than the specified value are referred to as first electric loads, and the electric loads 21, 22 with the ratio of the starting power to the steady power being less than the specified value. Are referred to as a second electric load.

  By the way, when the information stored in the history storage unit 12 is compared with the amount of power used on different days, a pattern may be extracted from the temporal change in the amount of power used. For example, when the power consumption of any one of the branch lines 31, 32,... Is analyzed, there is a possibility that the electrical loads 21, 22,. When such electric loads 21, 22,... (Branch lines 31, 32,...) Are extracted, the user may almost specify the time when the electric loads 21, 22,. Is possible. Therefore, the analysis unit 13 extracts the time when the specific electric loads 21, 22,... The scheduled time can be automatically discovered by the analysis unit 13 or set by the user himself / herself.

  Here, since the first electric load consumes starting power larger than the steady power, as shown in FIG. 10A, when the operation is stopped immediately before the scheduled time tp, the operation is resumed at the scheduled time tp. When doing so, a relatively large amount of power is consumed. Therefore, the total amount of power consumption may be reduced when the first electric load continues to operate as shown in FIG. 10B, rather than stopping the operation immediately before the scheduled time tp as shown in FIG. 10A.

  On the other hand, the second electric load operates even before the scheduled time tp as shown in FIG. 11B rather than continuing the operation before the scheduled time tp as shown in FIG. The total amount of power consumption is reduced when the power is stopped.

  From the above, when the user performs an operation to stop the electric loads 21, 22,... Immediately before the scheduled time tp, whether the operation is immediately stopped depending on whether the electric load is the first electric load or the second electric load. Depending on whether the operation is continued, there is a possibility that the total amount of power consumption may be large or small. Therefore, in the present embodiment, when an instruction to stop the first electric load before the scheduled time tp is given, which of the process of stopping the first electric load and the process of operating the first electric load is used. The analysis unit 13 is provided with a function for determining whether the total amount is reduced. Here, depending on the functions of the electric loads 21, 22,..., The total amount of power consumption may change depending on the time interval from the time when the stop instruction is received to the scheduled time tp. Therefore, it is preferable that the analysis unit 13 determines an operation in which the total amount of power consumption is smaller in consideration of this time interval depending on the types of the electric loads 21, 22,.

  When the operation of stopping the operation of the electric loads 21, 22,... Is performed before the scheduled time tp, the analysis unit 13 determines that an operation that saves energy can be performed by the above-described processing, the output processing unit 14 Through this, the display device 20 displays the operation advice. Therefore, when the user performs an operation to stop the operation of the electric loads 21, 22,..., The user can obtain an advice of an operation that reduces the total amount of power usage through the display device 20, thereby reducing the power usage. An operation that further reduces the total amount can be selected. When the advice is obtained through the display device 20, the operation of the electric loads 21, 22,... Is continued until the user performs an operation for instructing the operation of the electric loads 21, 22,. . Moreover, in order to perform the above-mentioned process, since the operation which stops operation | movement of the electric loads 21, 22, ... needs to be reflected in the energy management apparatus 10, the electric loads 21, 22, ..., the energy management apparatus 10, Are preferably communicable.

  By the way, in the 2nd technique, the case where the electric loads 21, 22, ... are mainly thermal equipment (air conditioning equipment, floor heating equipment, a bath with a heat retention function, etc.) is assumed. The operation of the thermal equipment is affected by the thermal inertia of the use environment, and a time delay occurs until the set state is reached after changing the setting (mainly the set temperature). Therefore, when the electric loads 21, 22,... Are thermal devices and are used again after the end of use, depending on the time interval after the end of the previous use, it is better to continue operating the electric loads 21, 22,. It may be energy saving.

  Now, it is assumed that the data shown in FIGS. 12A to 12C is stored in the history storage unit 12 with respect to the amount of power used in the air conditioner in the living room. FIGS. 12A to 12C show the power usage on different days, and comparing these data, it can be seen that this user has a tendency to start using the air conditioning equipment from 22:00. As in this example, the analysis unit 13 uses the data stored in the history storage unit 12 to extract habits when the user uses the electric loads 21, 22,. Here, if the air conditioner is used before 22:00, the process of restarting the operation from 22:00 after the operation of the air conditioner is temporarily stopped and the operation of the air conditioner are continued without being stopped. Processing. In addition, there is a possibility that a difference occurs in the total amount of power consumption between the former process and the latter process.

  Therefore, the analysis unit 13 according to the present embodiment performs processing and operation for temporarily stopping the operation when the air conditioner is operated before 22:00 and the user instructs to stop the air conditioner. And a function for estimating the total amount of power consumption for the processing to continue. Further, the analysis unit 13 has a function of comparing the magnitudes of the two types of estimated power usage amounts and giving advice to the user so as to perform processing with the smaller total power usage amount. In the example shown in FIGS. 12A to 12C, as shown in FIG. 12B, when the time interval from the time when the user performs an operation to stop the air conditioner to 22:00 is short (for example, about 10 minutes), It is advised that the power saving effect will be higher if the operation is continued without stopping the operation of the air conditioning equipment.

  Advice from the analysis unit 13 is presented to the display device 20 through the output processing unit 14. In order to perform this processing, for example, a code corresponding to the higher power saving effect between stop and continuation of operation is given from the analysis unit 13 to the output processing unit 14, and the output processing unit 14 sends a message corresponding to the code. What is necessary is just to extract and show to the display apparatus 20.

  The process in which the analysis unit 13 estimates the total amount of power usage will be briefly described. As shown in FIG. 13, the electrical loads 21, 22, etc. such as thermal devices have a large amount of power consumption immediately after the start of operation, and when a time corresponding to the thermal inertia of the usage environment has elapsed, There is a tendency to shift to a steady state with little fluctuation. Here, the amount of power used in the steady state is wa, the time from the start of the operation of the electric loads 21, 22,... To the steady state is Hb, and the total amount of power used in the time Hb is Ws. . In addition, the time from when the operation of the electric loads 21, 22,.

  If the operation is continued without stopping the electric loads 21, 22,..., The steady state continues after the user tries to stop the operation of the electric loads 21, 22,. The steady state continues at. Therefore, the total amount W1 of power consumption from the time when the user performs an operation to stop the operation of the electric loads 21, 22,... Until the time (Ha + Hb) elapses is W1 = wa × (Ha + Hb). . On the other hand, when the operation is resumed after the electric loads 21, 22,... Are stopped, the total amount W2 of the power consumption is estimated using a simplified model, and is expressed as W2 = Ws = wa × Hb + Wb. Here, Wb is the power usage when it is assumed that the operation is performed in the steady state during this period out of the total amount of power consumption from the start of the operation of the electric loads 21, 22,. This represents the total amount of power consumption excluding the total amount wa × Hb. That is, Wb = Ws−wa × Hb.

  From the relationship described above, if W1 <W2, the total amount of power consumption decreases when the operation is continued, and if W1> W2, the total amount of power consumption decreases when the operation is stopped and then restarted. . That is, if wa × Ha <Wb, the power saving effect is enhanced by continuing the operation. In other words, when the time from the time when the operation for stopping the previous operation of the electric loads 21, 22,... Is performed to the scheduled time when the electric loads 21, 22, ... are operated next is shorter than Wb / wa. In addition, it can be said that the power saving effect is higher when driving is continued.

  The steady state power consumption amount wa and the total power consumption amount Wb up to the transition to the steady period depend on the usage environment (environment temperature, etc.) of the electric loads 21, 22,. Determined. Therefore, the analysis unit 13 advises an operation method in which the power saving effect becomes higher according to the time until the scheduled time to restart the operation when the user performs an operation to stop the electric loads 21, 22,. It becomes possible. Other configurations and operations are the same as those in the first, second, and third embodiments. The configuration of the present embodiment can be combined with any of the first to third embodiments.

  In the third embodiment, a technique for detecting whether or not the electric loads 21, 22,... Are used wastefully will be described. In the fourth embodiment, a technique for detecting an operation for realizing further energy saving will be described. did. It can be said that the information detected using the technique of Embodiment 3 or Embodiment 4 is information that reflects the behavior or habit of increasing the power consumption. Therefore, when the user is aware of this type of information, the user can obtain an action guideline for realizing energy saving.

  Therefore, it is preferable that the energy management apparatus 10 includes an information storage unit 20 that stores information detected by at least one of the third and fourth embodiments. That is, the information storage unit 20 was advised that the electric loads 21, 22,... Were wasted and that the operation was continued when the operation of the electric loads 21, 22,. Etc. are memorized. The information storage unit 20 stores the above-described information detected in an appropriate storage period (one week, one month, etc.). The information stored in the information storage unit 20 may be displayed on the display device 20 as a list, or may be displayed on the display device 20 as a result classified by the information content in the analysis unit 13.

  If the information obtained during the appropriate storage period as described above is presented to the user, the user can be aware of behaviors and habits that are contrary to energy saving and can obtain guidelines for performing actions that save energy.

  Furthermore, since the acquisition unit 11 acquires the time change of the power usage, the analysis unit 13 compares the relationship between the magnitude and time of the power usage with the past state (usually the initial state). Thus, it is possible to detect abnormalities (including deterioration) of the electric loads 21, 22,... For each branch line 31, 32,.

  Now, in the initial state of the electric loads 21, 22,..., It is assumed that the time change of the power usage amount from the start to the steady state has the characteristic shown in FIG. 14A. Further, it is assumed that the time change of the power consumption acquired at an appropriate timing has the characteristics shown in FIG. 14B or 14C. In order to compare these characteristics, feature quantities extracted from the characteristics are compared. Examples of the feature amount include a peak value of the power usage amount, a power usage amount in a steady state, and a time from start to transition to a steady state.

  For example, the characteristic of FIG. 14B shows a state where the peak value of the power usage amount is larger than that of FIG. 14A, and the characteristic of FIG. 14C shows a state where the power usage amount in a steady state is larger than that of FIG. . Therefore, the abnormalities of the electric loads 21, 22,... Are obtained by evaluating the feature amount extracted from the characteristic obtained at an appropriate timing by using the feature amount extracted from the characteristic such as the initial state as a reference as shown in FIG. It becomes possible to detect deterioration. Since the power usage amount acquired by the acquisition unit 11 is stored in the history storage unit 12, the analysis unit 13 extracts a feature amount by using a temporal change in the power usage amount stored in the history storage unit 12. The analysis unit 13 also determines the presence or absence of abnormality or deterioration of the electrical loads 21, 22,.

  Note that the feature amount obtained from the reference characteristic is preferably stored in the information storage unit 20. Further, depending on the type of the electric loads 21, 22,..., The characteristics of the electric power consumption may vary depending on the season and the day of the week. Therefore, for this type of electric loads 21, 22,. It is preferable to match as much as possible. Further, the feature value extracted from the reference characteristic is not extracted from the characteristic measured only once for the electrical loads 21, 22,..., But the average value of the feature values extracted from the characteristic measured a plurality of times is used. You may do it.

  It is preferable that the energy management device 10 described above is housed in a single container that can be attached to the indoor wall or the like together with the display device 20. The measuring means 41, 42,... Need only be accommodated in a distribution board (not shown), and the energy management apparatus 10 includes an interface unit for taking in the measured values of the measuring means 41, 42,. It is preferable.

  It is not essential to provide the display device 20 in the same container as the energy management device 10, and the display device 20 can also be provided so as to be separable. When the display device 20 is provided separately, display functions such as a television receiver, a tablet terminal, a personal computer, and a smartphone may be used. In this case, the output processing unit 14 of the energy management device 10 includes an interface unit that uses these display devices 20. Further, a personal computer provided with an interface unit for taking in power consumption from the measuring means 41, 42,... May be operated by a program for causing the personal computer to function as the energy management apparatus 10.

  While the invention has been described in terms of several preferred embodiments, various modifications and variations can be made by those skilled in the art without departing from the true spirit and scope of the invention, ie, the claims.

Claims (12)

In a plurality of power supply paths that supply power corresponding to a plurality of electrical loads, an acquisition unit that acquires, as power consumption, the amount of power for each specified measurement time for each power supply path;
A history storage unit that stores the power usage amount for each power supply path in association with the date and time acquired,
A power distribution with a relative frequency equal to or higher than a specified power threshold is obtained as standby power by obtaining a frequency distribution for the magnitude of power usage in a predetermined target period stored in the history storage unit, and the standby power is used as a reference An analysis unit having a function of determining whether or not an electric load corresponding to each power supply path is operating by comparing the reference value and the amount of power usage using the value;
An energy processing apparatus comprising: an output processing unit that causes a notification unit to present a determination result by the analysis unit. The output processing unit displays a floor plan of a space in which the plurality of electrical loads are arranged on a display device, and displays information corresponding to the amount of power used for each power supply path acquired by the acquisition unit on the floor plan. The energy management apparatus according to claim 1, further comprising: A setting information storage unit in which setting information serving as a reference is set for each operation of the plurality of electric loads is added,
The analysis unit is configured to determine a usage state of each of the plurality of electric loads by comparing information extracted from the power usage amount acquired by the acquisition unit with setting information of the setting information storage unit. The energy management apparatus according to claim 1, wherein the energy management apparatus includes: Whether the analysis unit is wastefully using each of the plurality of electric loads by comparing the information extracted from the power usage amount acquired by the acquisition unit with the setting information of the setting information storage unit The energy management apparatus according to claim 3, wherein the energy management apparatus has a function of determining whether or not the usage state is present. The setting information is a power reference value defined for power consumption,
The analysis unit has a function of instructing the output processing unit to present to the notification means when the power usage acquired by the acquisition unit reaches the power reference value. The energy management device according to claim 3 or 4. A load control unit for controlling the operation of each of the plurality of electrical loads;
The setting information is a peak cut value defined for power consumption,
The analysis unit controls the operation of the electric load corresponding to the direction in which the power usage amount is reduced with respect to the load control unit when the power usage amount acquired by the acquisition unit reaches the peak cut value. The energy management device according to any one of claims 3 to 5, wherein the energy management device has a function of instructing to. The analysis unit
A function of extracting a power supply path to which an operating electrical load is connected using the power consumption for each of the power supply paths acquired by the acquisition unit;
The energy management apparatus according to any one of claims 1 to 6, further comprising: a function of causing the output processing unit to present the space associated with the extracted power supply path from the output processing unit. A type storage unit in which the type of electric load corresponding to each power supply path is registered;
The analysis unit
About the power supply path to which the specific type of electrical load extracted using the type storage unit is connected, as a habit from the time change of the power consumption stored in the history storage unit, A function that predicts the scheduled time when the operation will start,
Processing to stop the specific type of electrical load based on the time difference between the received time and the scheduled time when an instruction to stop the specific type of electrical load is made before the scheduled time And the function to determine whether the total amount of power consumption is reduced,
The energy management apparatus according to any one of claims 1 to 7, further comprising a function of causing the notification unit to present a process of reducing the total amount of power consumption through the output processing unit. The analysis unit
By using the time change of the power consumption stored in the history storage unit, the plurality of electric loads fed from the plurality of power supply paths can be configured such that the magnitude of the starting power is equal to or greater than a specified value with respect to the steady power A function of classifying the first electric load into a first electric load and a second electric load in which the magnitude of the starting power is less than a specified value with respect to the steady power;
For the power supply path to which the first electric load is connected, the time when the first electric load is customarily used is extracted as the scheduled time from the time change of the power consumption stored in the history storage unit. Function and
When an instruction to stop the first electric load before the scheduled time is given, either the process of stopping the first electric load or the process of operating the first electric load reduces the total amount of power usage. A function to determine whether
The energy management apparatus according to claim 1, further comprising: a function for causing the notification unit to present a process of reducing the total amount of power consumption through the output processing unit. The history storage unit
A function of storing a history in which the analysis unit presents the process of reducing the total amount of power consumption through the output processing unit to the notification unit;
The energy management apparatus according to claim 8, further comprising a function of reading the history. The analysis unit obtains a feature amount extracted from a change in power usage over time for each of the power supply paths, and compares the feature quantity obtained in the past with the plurality of power supplies fed through the plurality of power supply paths. The energy management apparatus according to claim 1, wherein the energy management apparatus has a function of detecting the presence or absence of an abnormality in the electrical load. Computer
In a plurality of power supply paths that supply power corresponding to a plurality of electrical loads, an acquisition unit that acquires, as power consumption, the amount of power for each specified measurement time for each power supply path;
A history storage unit that stores the power usage amount for each power supply path in association with the date and time acquired,
A power distribution with a relative frequency equal to or higher than a specified power threshold is obtained as standby power by obtaining a frequency distribution for the magnitude of power usage in a predetermined target period stored in the history storage unit, and the standby power is used as a reference An analysis unit having a function of determining whether or not an electric load corresponding to each power supply path is operating by comparing the reference value and the amount of power usage using the value;
The program for functioning as an output process part which makes a notification means show the determination result by the said analysis part.

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